Diagnostic error messages........................................................................................................................................................................ 121
BIOS password .................................................................................................................................................................................................... 121
Performance (OS)......................................................................................................................................................................................................... 122
Intermittent shutdown.................................................................................................................................................................................... 122
Blue screen .............................................................................................................................................................................................................124
Freeze at Windows Logo (hang or lockup)....................................................................................................................................... 125
Electromagnetic Interference (EMI)..................................................................................................................................................... 126
No wake up..............................................................................................................................................................................................................127
Unresponsive........................................................................................................................................................................................................128
Slow performance ............................................................................................................................................................................................129
HP Smart Adapter warning message.................................................................................................................................................129
Incorrect time and date ................................................................................................................................................................................130
Display...................................................................................................................................................................................................................................131
Display anomalies..............................................................................................................................................................................................131
Symptom ....................................................................................................................................................................................................... 131
Quick check................................................................................................................................................................................................ 132
HP PC Hardware Diagnostics (UEFI) for video test........................................................................................................ 132
Display assembly diagram.............................................................................................................................................................. 132
Dead pixel................................................................................................................................................................................................................133
No video (internal) .............................................................................................................................................................................................133
No video (external)............................................................................................................................................................................................133
DisplayPort/VGA ................................................................................................................................................................................................134
HDMI ...........................................................................................................................................................................................................................134
No or bad external video via docking..................................................................................................................................................135
Incorrect or missing color/distorted image....................................................................................................................................135
Touch screen.........................................................................................................................................................................................................136
I/O devices ..........................................................................................................................................................................................................................137
Keyboard...................................................................................................................................................................................................................137
Keyboard pointing stick (select products only)............................................................................................................................138
Keyboard backlight...........................................................................................................................................................................................139
Touchpad .................................................................................................................................................................................................................139
Network connectivity (RJ-45 jack).........................................................................................................................................................140
Network connectivity wireless (WLAN) .............................................................................................................................................140
WWAN......................................................................................................................................................................................................................... 141
USB ............................................................................................................................................................................................................................... 141
Smart card reader............................................................................................................................................................................................ 142
Speaker, headphone - audio issues.....................................................................................................................................................143
Thunderbolt (TB) .................................................................................................................................................................................................144
Storage................................................................................................................................................................................................................................. 145
Hard drive or solid-state drive not recognized.............................................................................................................................146
No boot to operating system (no read-write error) ....................................................................................................................147
Read-write error .................................................................................................................................................................................................148
Slow performance ............................................................................................................................................................................................149
Blue screen (BSOD) error............................................................................................................................................................................149
Noisy hard drive..................................................................................................................................................................................................149
Mechanical........................................................................................................................................................................................................................150
Noise (sound)........................................................................................................................................................................................................150
Fan runs constantly .......................................................................................................................................................................................... 151
Thermal shutdown (hot)................................................................................................................................................................................ 152
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